MSP432E401Y: sometimes, the code is stuck at SPI_close().

Frank(EP) Liu

Expert 4780 points

Part Number: MSP432E401Y

hi Expert,

my customer use spi to read data from other ic.

every time, they read the IC. They will open and close the spi bus.

but sometimes, the ic would be stuck(crashed) at SPI_close().

What's the purpose of the SPI_close() function?

If I keep spi function open during the device operation and do not execute SPI_close() function, will this have any impact?

BR,

frank

over 2 years ago

0 Jim Whitehouse over 2 years ago

Expert 1431 points

I suspect they have already raised a query -
https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1212415/msp432e401y-spi_close-func-hangs-while-reading-results-from-an-adc

I use SPI and I open the connection once at start, and don't ever close (or I do in a shutdown operation that never really gets called except for a test harnesses). This works for me. The only issue is that there might be un underlying problem causing spi_close() to crash, and it would be good to find it - it should work!

0 Charles Tsai over 2 years ago

TI__Guru**** 190616 points

Hi,

Like Jim said, you would normally open the handle and carry on your operation. You don't really open and close the handle constantly per each SPI transfer. If you look at the callstack below, SPI_close is mainly to do some chores (e.g. disable SPI, delete the Hwi and Semaphore, unconfigure the pins and etc) after the operation is close.

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MSP432E401Y: sometimes, the code is stuck at SPI_close().